Mix together all the ingredients for the marinade.
In a large flat dish, lay out the leg of lamb and coat in the marinade.
Cover and chill over night.

Light a barbecue and when the coals turn white add the leg to the grill.
Set a timer and turn the leg of lamb every minute for 15 – 20 minutes until it is beautifully charred and cooked to your liking – it may need longer if you don’t like it pink